Ionic Liquids in Polyethylene Glycol Aqueous Solutions: Salting-in and Salting-out Effects

2007 ◽  
Vol 138 (11) ◽  
pp. 1153-1157 ◽  
Author(s):  
Zoran P. Visak ◽  
José N. Canongia Lopes ◽  
Luis Paulo N. Rebelo
Keyword(s):  
Ionic Liquids ◽  
Polyethylene Glycol ◽  
Aqueous Solutions ◽  
Salting Out

Measurement and Modeling of Solubility of Galactose in Aqueous Ionic Liquids, 1-Butyl-3-Methyl Imidazolium Bromide, 1-Hexyl-3-Methyl Imidazolium Bromide and 1-Butyl-3-Methylimidazolium Chloride at T = (298.15 And 308.15) K

2019 ◽  
Vol 25 (4) ◽  
pp. 319-330
Author(s):  
Mohammad Taghi Zafarani-Moattar ◽  
Hemayat Shekaari ◽  
Elnaz Mazaher Haji Agha
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Activity Coefficient ◽  
Aqueous Solutions ◽  
Mole Fraction ◽  
Gravimetric Method ◽  
Green Solvents ◽  
Salting Out ◽  
Liquid Solutions ◽  
Activity Coefficient Models

Background: Saccharides are considered as abundant, cheap and renewable starting materials for chemicals and fuels. Recently, ionic liquids have been used as green solvents for saccharides. The solubility values of galactose in aqueous ionic liquid solutions are not available. Thus, the main objective of this research was to determine the solubility of galactose in aqueous solutions containing ionic liquids, 1-butyl-3-methyl imidazolium bromide, [BMIm]Br, 1-butyl-3-methylimidazolium chloride [BMIm]Cl and 1-hexyl-3-methyl imidazolium bromide, [HMIm]Br at different mole fractions of ionic liquids at T = (298.15 and 308.15) K. Methods: In this study, the gravimetric method was used to measure the solubility of galactose in aqueous ionic liquids solutions. Results: The solubility values of galactose in water and aqueous ionic liquid solutions were correlated with the activity coefficient models of Wilson, NRTL, modified NRTL, NRF-NRTL, and UNIQUAC. Conclusion: It was concluded that with increasing the mole fraction of ionic liquids, the solubility values of galactose decrease and in fact all of these ionic liquids show salting-out effect on aqueous galactose solutions and this behavior is stronger in ionic liquid 1-butyl-3-methylimidazolium chloride.

scholarly journals Salting-out in Aqueous Solutions of Ionic Liquids and K3PO4: Aqueous Biphasic Systems and Salt Precipitation

2007 ◽  
Vol 8 (8) ◽  
pp. 736-748 ◽  
Author(s):  
Vesna Najdanovic-Visak ◽  
José Lopes ◽  
Zoran Visak ◽  
J. Trindade ◽  
Luís Rebelo
Keyword(s):  
Ionic Liquids ◽  
Aqueous Solutions ◽  
Salt Precipitation ◽  
Salting Out ◽  
Aqueous Biphasic Systems ◽  
Aqueous Biphasic ◽  
Biphasic Systems

scholarly journals Enhancing Artemisinin Solubility in Aqueous Solutions: Searching for Hydrotropes based on Ionic Liquids

2021 ◽  
Vol 534 ◽  
pp. 112961
Author(s):  
Isabela Sales ◽  
Dinis O. Abranches ◽  
Pedro Costa ◽  
Tânia E. Sintra ◽  
Sónia P.M. Ventura ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Aqueous Solutions

scholarly journals Enhanced Adsorption of Bisphenol A from Aqueous Solution with 2-Vinylpyridine Functionalized Magnetic Nanoparticles

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1136 ◽  
Author(s):  
Qiang Li ◽  
Fei Pan ◽  
Wentao Li ◽  
Dongya Li ◽  
Haiming Xu ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Magnetic Nanoparticle ◽  
Maximum Adsorption Capacity ◽  
Salting Out ◽  
Functionalized Magnetic Nanoparticles ◽  
Ft Ir ◽  
Fe3o4 Nanospheres ◽  
Enhanced Adsorption

In this study, a novel 2-vinylpyridine functionalized magnetic nanoparticle (Mag-PVP) was successfully prepared. The prepared Mag-PVP was characterized by transmission electronic microscopy (TEM), Fourier transform infrared spectrophotometry (FT-IR), vibrating sample magnetometry (VSM) and thermogravimetric analysis (TGA), and was used for the adsorption of bisphenol A (BPA) from aqueous solutions. Mag-PVP, which is composed of Fe3O4 nanoparticles and poly divinylbenzene-2-vinylpyridine (with a thickness of 10 nm), exhibited magnetic properties (Ms = 44.6 emu/g) and thermal stability. The maximum adsorption capacity (Qm) of Mag-PVP for BPA obtained from the Langmuir isotherm was 115.87 mg/g at 20 °C, which was more than that of Fe3O4 nanospheres. In the presence of NaCl, the improved adsorption capacity of Mag-PVP was probably attributed to the screening effect of Mag-PVP surface charge and salting-out effect. In the presence of CaCl2 and humic acid (HA), the adsorption capacity of BPA decreased due to competitive adsorption. The adsorption of BPA by Mag-PVP increased slightly with the increase in pH from 3.0 to 5.0 and obtained the largest adsorption amount at pH 5.0, which was probably attributed to hydrogen bonding interactions. Moreover, in actual water, Mag-PVP still showed excellent adsorption performance in removing BPA. The high adsorption capacity and excellent reusability performance in this work indicated that Mag-PVP was an effective adsorbent for removing BPA from aqueous solutions.

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